Safety device for centrifugal extractors.



W. BARTHOLOMEW 611. F. BRODERICK.

SAFETY DEVICE FOR CENTRIFUGAL EXTRACTORS.

APPLICATION FILED FEB. 18, I913.

2 SHEETS-SHEET l.

13%14987. Patented Feb. 6,1917.

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W. BARTHOLOMEW & J. F. BRODERICK.

SAFETY DEVICE FOR CENTRIFUGAL EXTRACTORS.

APPLICATION FILED FEB. I8. I913- II' QIQ QW Patented Feb. 6,1917.

2 SH'EETSSHEET 2.

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unrrnn snares PATENT WILLIAM: BABTHOLUMEW AND JAMES TERRODERTCK, 0h UHIUAGQ, ITLdlTllTUIS, AlSiFrilEGhl' @RS T0 TBQY LAUNDRY MACHINERY WGMIPAEHF, LTD, Ell? CHTGAMGQ, ft'hlhllhltllffi,

CQLt-PQRATKQN .GF NEW YORK.

SAFETY DEVICE FUR CENTRIFUGAL EXTRAGTQRd.

Specification oi Itettcrs Patent.

' Patented Febo ithlte application flied February 118; 19113. enial Ito. 7%,139.

Tc all witcmz't may concern: I

Be it known that we, WILLIAM Ban'rnorco- MEW and dines F. Bnonnnrcn, citizens of the United States, residinglat Chicago, in the county of Cook and State of llllincis have invented certain new and useful limprovernents in Safety Devices for Centrifugal Extractors, of which the following is specification.

Our inyention relates in general to laundry machinery, and more particularly tc centrifugal characters.

The high speed at which the baskets of centrifugal extractors are rotated renders their use dangerous to careless o erators unless such extractors are provide with safety appliances for preventin access to the baskets while they are rotating. In order that such safety devicesmay fully protect the operators, it is necessary that access should be prevented to the baskets not only while the power is applied to rotate them, but after the disconnection of the driving power and while the baskets continue to rotateby momentum at dangerous speeds.

The primary object of our invention is to provide a centrifugal extractor in which the cover must be locked in closed position when power is applied to rotate the basket, and in which the cover cannot be. unlocked while the basket continues to rotate.

A further object of our invention is to provide a centrifugal extractor having a cover for preventing access to the revolving basket, in which power can only be applied to the basket after the cover has been locked, and in which the driving means which necessarily rotates while the basket rotates will be so connected with the cover that it cannot be opened until such driving means have ceased to move.

A further object of our invention is to provide an improved centrifugal extractor, which will be simple in construction and operation, and the use of which will be unattended by any possible injury to the operators.

Our invention will be more fully disclosed hereinafter with reference to the accompanying drawings, in which the same is inclosed the rotating'basket a. 1B designates the support for the casing which comprises standards and base 6 adapted to rest on the door or other underlying supporting surface. (3 designates the cover for the casing which, when closed, overlies the basket and prevents access thereto. D designates a vertical spindle upon the upper end of which the basket is mounted and by which it is rotated. (l'designates a pulley concentrically surrounding and fixed to "the spindle D. E designates a driving belt engaging the pulley d and guided by pulleys l and F 'F indicates a driving pulley around which the belt E extends.

Suitable supporting means are provided for the idlerpulleys and also the driving pulley which may conveniently consist of a pair of brackets G and G secured to the standards of the casing support B and also to the casing A, as shown in Figs. 1 and L Depending from the brackets G and G are supplemental brackets g and g in which are journaled the guide pulleys F and F The upper ends of the pair of brackets G and G are provided with bearings g and g in which are journaled the ends of the shaft H upon which is fixed the driving pulley F.

Mounted upon the shaft H are pulleys H and H, the former of which is fixed to the shaft while the latter isloose thereon. 7i designates a power belt leading from any suitable source of power and adapted to engage either of the pulleys H or H by Bil means of a suitable belt shifter L comprising parallel curved rods Z and Z between which the power belt 72. extends. The belt shifter L is secured to a horizontally reciprocating rod K which is mounted in bearings g and g mounted in any suitable manner upon the extractor casing but preferably connected with the main supporting brackets G and G M designates a lever for actuating the belt shifter pivoted at m upon the bearing 9 and plvotally connected intermediate of its ends at k to an arm K secured to and projecting from the outer end of the belt, shifter rod K.

The centrifugalextractor above described does not in itself constitute our present invention but is illustrated and described in order that our invention may be fully disclosed.

The cover C is provided With-an extension at its rear 0 which forms one member of the hinge which pivotally supports the cover. The extension 0 is bifurcated so as to straddle a supporting bracket G which may be conveniently formed as part of the main supporting brackets G and G, as shown in Fig. 5. I

A bell crank lever N is pivotally mounted at 12. upon the bracket n adjacent the hinge of the cover, such bracket being secured to any suitable support. 0 designates a bolt pivotally connected by means of a slot and olt to the bell crank lever N and adapted to be reciprocated through alined holes formed in a pair of spaced ears 0 and an intermediate ear 0 formed on the rear ex- -Figs. 2 and 3). Pivotally connected to the lower arm of the bell crank lever N is a rod P which is pivotally connected at its other 7 into the end to a detent lever R fulcrumed intermediate of its ends upon a bracket S secured to the supporting frame G The free end of the detent lever B is adapted to project ath of rotation of a series of laterally pro ecting lugs R carried by the driving pulley F.

he short crank arm U projects radially from the rod to which pivotally connects the two hinge members of the cover C, such rod being fixed to rotate with the cover. U designates a rod pivotally connected at one end to the crank arm U and at its other end extending through a guide sleeve g supported by the bracket 9 through which the inner its pivotal axis. The bell crank lever N is held in position to retain the bolt 0 in such locked condition by means of the spring N position that its free end is out of the path of the lugs R on the driving pulley F. Should any attempt be made to unlock the cover by withdrawing the bolt 0 during the operation of the machine, such attempt would be prevented by reason of the lugs R engaging the free end of the detent lever B and preventing the same from being oscillated to the position shown in dotted lines in Fig. 5, and thereby preventing the oscilla tion of the bell crank lever N necessary to withdraw the bolt from looking engagement with the cover. It will, therefore, be. seen that the cover cannot be unlocked as long as the basket is in rotation, inasmuch as the basket rotates coincidentally with the driving paulley F- through the medium of the belt When it is desired to open the cover, to remove the articles from which the water has been extracted and to insert other articles, it is first necessary to operate the belt shifter by swinging the lever M from the position shown in full lines to that shown in dotted lines in Fig. 4, thereby shifting the belt 72. from the tight pulley H to the loose pulley H The cover continues to .be locked even after the power has been disconnected by shifting the belt 71, as long as the basket continues to revolve by momentum. When the basket has come to a standstill, which is usually facilitated by the use of a brake, the bell crank lever N is oscillated so as to withdraw the bolt 0 from locked engagement with the ear 0 on the cover. This movement of the bell crank lever oscillates the detent lever B so that its free end projects in the path of rotation of the lugs R, but as the pulley F on which the lugs R are carried is not in motion, such-movement of the de tent lever is permitted. The cover may then be opened and such opening movement of the cover projects the rod U into the path of movement of the belt shifter rod K so that the power belt cannot be shifted to the tight pulley as long as the cover is open. When a new charge of articles havebeen placed in the basket, the bell crank lever N is oscillated so as to withdrawthe bolt 0 from the path of the ear 0 on the cover, thereby permitting the cover to be closed. The spring N'automatically oscillates the bell crank lever, thereby reciprocating the bolt 0 into locked engagement with the ear 0 on the cover. The closing movement of the cover withdraws the rod U from the path: of the belt shifter rod K, thereby pernaraeev' n commences to rotate and as the lugs R prevent the oscillationof the detent lever R in a direction to disengagethe bolt from the cover.

From the foregoing description it will be observed that we have invented improved.

safety. devices for centrifugal extractors,

and similar machines, by means of whichpower cannot be applied to rotate the basket until the cover has been closed; in which the no cover cannot be opened until the driving power has been disconnected; and in which the cover will be positively locked in closed position as long as the basket continues to rotate either through the driving power or by momentum after the driving power has been disconnected.

While we have illustrated and described our invention as embodied in a centrifugal extractor and have defined the same in the to following claims with reference to such embodiment thereof, yet we do not wish thereby to be understood as restrictln the application of our invention to centrifugal extractors,,. but intend thereby to protect. it for at whatever uses it may be adapted and in whatever forms it may be capa cal embodiment.

What we claim is: 1. In a centrifugal extractor, the combinale of practiac tion with a rotary basket, a belt for rotating said basket, a driving pulley engagin said belt, a cover for said basket, a lock or retaining said cover closed, and a movable member connected to said lock for controla5 ling the movement thereof, said means when the cover is closed extending into the path ofmovement of elements carried by said driving pulley and prevented by successive contacts of said elements therewith from ing said belt, a reciprocating bolt supported upon said casing and adapted tolock said cover in closed position, and means controlled by said driving pulley for prevent ing the disengagement of said bolt from the cover during the rotation of said pulley.

t. In a centrifugal extractor, the combination with a rotary basket, of a cover for closing said basket, a belt for rotating said basket, a driving pulley engaging said belt, a bolt for locking said cover closed, a bell. crank lever operatively connected with said bolt, and means controlled by said driving pulley for preventing the movement of said bell crank lever to disengage said bolt from bil the cover during the rotation of said driving pulley.

5. In a centrifugal extractor, the combination with a rotary basket, of a casing inclosing said basket, a cover pivotally mounted on said casing, a bolt for. locking said cover closed, a belt for rotating said basket, a driving pulley engaging said belt, a bell crank lever pivotally mounted on said casing and operatively connected to said bolt, a reciprocating rod connected with said bell crank lever, and means controlled by said driving pulley for obstructing the move" ment of said rod and thereby preventing said bell crank lever being moved to unlock the cover.

6. In a centrifugal extractor, the combinationwitha rotary basket, of a casing inclosing said basket, a cover pivotally mounted on said casing, a bolt for locking said cover closed, a belt for rotating said basket, a driving pulley engaging said belt, a bell crank lever pivotally mounted on said cas ing and operatively connected with said bolt, a reciprocating rod pivotally connected with said bell crank lever, a detent lever pivotally connected to said rod, and projections on said driving pulley having a path intersecting the path of said detent lever, thereby preventing the movement of said detent lever necessary to permit said cover to be unlocked.

7. In a centrifugal extractor, the combilltl B the cover during the rotation of said pulley.

nation with a basket, of a casing inclosing said basket, a cover pivotally mounted on said casing, a reciprocating bolt supported on said casing, a projection on said cover having a hole therethrough registering with said bolt when the cover is closed, a lever for reciprocating said bolt into and out of engagement with the hole in said projection,

and means forpreventing the disengagement of said bolt from said projection during the rotation of the basket.

8. In a centrifugal extractor, the combination with a rotary basket,of a casing inclosing said basket, a cover hinged to said casing, a reciprocating bolt supported upon said casing, a projection on said cover having a hole therethrough registering with said 1% 50 being moved into position to disengage the bolt from the cover.

2. In a centrifugal extractor, the combination with a rotary basket, of a belt for rotating said basket, a driving pulley en- 5 gaging said belt, a cover for said baskct, a bolt for locking said cover in closed position, and means controlled by said driving pulley and operatively connected with said bolt for preventing the disengagement thereof from 3. In a centrifugal extractor, the combination with a rotary basket, of a casing within which said basket is inclosed, a cover pivotally mounted on the casing, a belt for ro- 65 tating said basket, a driving pulley engagbolt when the cover is closed, a bell crank lever pivotally mounted on said casing and operatively connected with said bolt, a spring connected with said bell crank lever for oscillating the same to move the bolt into engagement with-said projection, a belt for rotating said basket, a driving pulley engaged by said belt, a reciprocating rod connected with said bell crank lever, a detent lever pivotally connected with said rod, and laterally projecting lugs on said pulley having a path intersecting the path .of said detent lever, thereby preventing the moving of said detent lever necessary to permit said cover to be unlocked.

9. In a centrifugal extractor, the combination with a rotary basket, of a belt for rotating said basket, a driving pulley en gaging said belt, a cover for said basket,

means for retaining said cover in closed position, and a movable member connected with said means and having a path of movement during the opening of the cover intersecting the path of rotation of rigid parts carried by said driving pulley, whereby the rapid successive contact of said parts with said member prevents the movement thereof necessary to permit the opening of said cover.

10. In a centrifugal extractor, the combination with a rotary basket, of a belt for rotating said basket, a driving pulley engaging said belt, a cover for said basket, means for retaining said cover closed, and'a member connected with said means extending into the path of movement of elements carried by and immovable relatively to said driving pulley when the cover is open and prevented by successive contacts of said elements therewith during the rotation of said pulleyfrom being moved into position to permit the opening of said cover.

In testimony whereof, we have subscribed our names. I

WILLIAM BARTHOLOMEW.

JAMES F. BRODERICK. Witnesses: v

G. M. LEARY, F. C. WHITMORE. 

